'http://example.com/video_720p.mp4', 'mp4_480' => 'http://example.com/video_480p.mp4', ]; $urls = VideoUrls::fromArray($data); $this->assertInstanceOf(VideoUrls::class, $urls); $this->assertSame('http://example.com/video_720p.mp4', $urls->mp4_720); $this->assertNull($urls->mp4_1080); } }